Improvement in filtering-points for well-tubes



U ITED STATES- PATENT OFFICE GEORGE A. IDUVLEY, OF NEYV YORK, N. Y.

IMPROVEMENT IN FlLTERlNG-POINTS FOR WELL-TUBES.

Specification forming part of Letters Patent No. 146,902, dated January2.7, 1874; application filed November 13, 1873.

To all whom it may concern:

Be it known that I, GEORGE A. llAwLnY, of New York, in the county of NewYork, and in the State of New York, have invented certain new and usefulImprovements in Filterin Points for Drivenell Tubes; and do herebydeclare that the following is a full, clear, and exact descriptionthereof, reference being had to the accompanying drawing making a partofthis specification, in which Figure 1 is a side elevation of my improveddevice, and Fig. 2 is acentral longitudinal sec tion of the same.

Letters of like name and kind refer to like parts in each of thefigures.

In the formation of driven wells much difficulty has been experienced inso constructing the filtering-point of the well-tube as to efiable thesame to be driven to place or removed from the well without injury toits screens, the means ordinarily used to protect the latter from injuryaffording, in most instances, a lodgment for sand, dirt, &c., whichoperate to obstruct said strainers, and thus render the well in ameasure useless.

To obviate this ditticulty is the design of my invention; which consistsin a filter-point having its strainers arranged within grooves formed inits periphery, which grooves are separated and said strainers protectedby means of transverselyrounded ribs or hands, substantially as and forthe purpose hereinat ter specified.

In the annexed drawing, A represents a well-tube point, providedinteriorly with an opening, B, which extends longitudinally andcentrally from its upper end downward nearly to its lower end, whileexteriorly said device is conical or pointed at its lower or solid end,and between the same and its upper end is provided within its peripherywith a number of annular grooves, a, that are separated by means of ribsa u a, which have, transversely, a half-round shape. At the outer sidesof the upper and lower grooves the point A extends upward and outward ina curve'sim ilar to the curves of said ribs. \Yithin the bottom of eachgroove (1 are provided a number of openings, 1), which extend radiallyinward from equidistant points, and enable communication to be hadbetween theinterior and exterior of the pipe or point A. Screens ofwire-cloth, reticulated sheet metal, or other similar material, C, arenow titted closely around the tube within the bottom of each groove, andcompletes the device, which is used in the ordinary manner, by beingattached to the end of a pipe and driven downward into the ground untila water-vein is reached, when the water will pass inward through saidscreens, and can be drawn upward through said pipe.

As these devices have heretofore been made, in some instances the ribshave been parallel with the axis of the point, and the wire-gauze in asingle sheet placed over them, or circumferential bands have been usedwith the wiregauze, filling the entire space (in a single sheet) betweenthe head and point and, again, the body of the point has been made withexpanding or contracting ring-sections, the perforated or upper parts ofwhich are covered with wiregauze; but my devicediffers from all these inplacing the wire-gauze in depressions formed by the circumferential.ribs of the particular form described, whereby they are almostcompletely protected, as is above clearly set out.

The advantages obtained by this construction are as follows: First, bymaking the dividing ribs and the portions of the tube coir tiguous 'tothe outer side of the upper and lower grooves semicircular, but slightresistance is olfered to the downward passage of said tube through thesoil, or itswithdrawal there. from whenever occasion may require.Second, the point can be driven into or removed from the ground withoutinjury, while, as ordinarily constructed, the points are seldom intactwhen driven to any distance, and their removal is certain -to destroytheir useful- .llGSS.

Having thus fully set forth the nature and merits of my invention, whatI claim as new 1s 7 The well-tube point A, having its strainers orscreens 0 arranged within grooves, a, formed in its periphery, whichgrooves are sepa 'atcd and said strainers or screens protcctcd by meansof the ribs or bands at a, a, which have, transversely, ahalf-roundshape, substantially as and for the purpose specified.

In testimony that I claim the foregoing I have hereunto set my hand this27th day of October, 1873.

GEORGE A. H AYVLEY.

Witnesses:

JOHN G. HEsTEn, W. F. RAvMoNn.

